The study showed that the increase of methanol mass fraction of diesel/methanol blends will result in the increase of heat release rate in premixed burning phase and shorten the combustion duration of diffusive burning phase.
The significant gas of each phase were different: the H2O absorption peak is primary at evaporated phase,the C2H4 and CH4 absorption peak isappearing at oxidated phase and the C2H4 and CH4 absorption peak is strong at combustion phase.
The experiment results indicate that mass concentration of particulate shows unimodal distribution, and the peak point lies at about 20°CA ATDC, corresponding to the diffusion combustion phase of diesel combustion.
With this mode,the NO x formation mechanism of the DME has been investigated. The results show that NO x formation mainly occurs in the diffuse combustion phase,and the low NO x emissions are due to the low combustion temperature.
A submodel for the mass and heat transfer among the air, fuel spray and combustion products was derived for studying the formation of NO_x The results of this study showed that the main approach to reduce NO* emission is to enhance the turbulent mixing, especially during the diffusion combustion phase, and that a suitable air swirl is favorable to the net reduction of NO_x although it might promote NO, formation during the premixed combustion phase.
Using test data obtained from different test units, the burning property of several typical low volatile solid fuels are being analysised. Theoretical simulation development of coal meal at different burning stage in described and basic principle and method for intensifying anthracite burning in combination with theory and test data is proposed as well.
The evolution of a rotating star with a mass of 16M⊙ at the hydrogen burning phase is considered together with the hydrodynamic processes of angular momentum transport in its interior.
At a fairly high angular momentum, more specifically, at J = 3.69 × 1052 g cm2 s-1, the star during the second half of the hydrogen-burning phase in its convective core has characteristics typical of classical early Be stars.
IC 4651 could have undergone mass loss before reaching their helium core burning phase of evolution.
However, in these fully turbulent calculations the overpressures are still too high and the flame arrival times too low, indicating the need for a model for the early laminar burning phase.
We investigate the possibility that the12C+12C reaction proceeds, at low energies (relevant to the carbon burning phase), via direct transfer of an α-particle.
The adjoint system integrals for time free, optimal N-impulse transfer during a firing period in 5-phase selected are derived.
Muscle force production was modelled as the product of length/tension properties, force/velocity properties, and activation due to neural inputs (incorporating both recruitment and firing period).
The true group pacemaker (PM) shift under autonomic drive is then related to a continuous competition between the intrinsic auto-firing period hierarchy and the autonomic topological susceptibility hierarchy.
When deciding the firing period for chamotte lightweight parts with combustible additives, it is essential to consider their thickness.
In the drying and firing period, the line resolution decreased due to the existence of second-stage flow, which is caused by the decrease in viscosity due to the increase of temperature, and by the softening and melting of the binder.